一种新型亚胺基吡啶铁配合物和茂金属复配催化乙烯原位共聚制备LLDPE

作     者：黄英娟 刘盘阁 姬荣琴 曹晨刚 闫卫东 胡友良 

作者机构：河北工业大学化工学院高分子科学与工程研究所天津300130 中国科学院化学研究所分子科学中心工程塑料国家重点实验室北京100080 

出 版 物：《高分子学报》 (Acta Polymerica Sinica)

年 卷 期：2004年第14卷第1期

页      面：125-128页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：国家自然科学基金 (基金号 50 2 73 0 0 9) 工程塑料国家重点实验室开放基金 (基金号SKLEP0 0 62 ) 天津市自然科学基金重点项目 (基金号 0 2 3 80 2 2 11) 河北省自然科学基金 (基金号 2 0 2 0 0 8) 河北省博士基金资助项目 

主　　题：亚胺基吡啶铁配合物 茂金属 复配催化剂 乙烯原位共聚 短支链线性低密度聚乙烯 LLDPE 共单体效应 

摘      要：Linear low density polyethylene from ethylene as an o nly monomer was prepared by the combination catalyst system of Et(Ind) 2ZrCl 2 an d {2 [2 Me 4 Br C 6H 3NC(Me)] 2C 5H 3N}FeCl 2 activated with methy laluminoxane (MAO).The two catalysts were well matched in a single reactor and i t was observed that the “comonomer effect appeared in the in situ copolymeriz ation of *** comonomer effect was some strongly influenced by the molar ratio of Al to (Fe+Zr) and the polymerization *** 60℃ and n(Al )/n(Fe+Zr)=2000,the maximum activity of the catalytic system(8 5×10\+6g/mo l·h) was 4\^25 times higher than that of homopolymerization of ethylene(2\^0×1 0\+6g/mol·h),and the value of n(Fe)/n(Zr) was 0 *** n(Al)/n(F e+Zr)=1000,the maximum activity *** polymerization temperatures incr eased,the maximum activity of the in situ copolymerization decreased and the co rresponding ratio of Fe to Zr also *** copolymers made from this catalyt ic system had the characteristics of low melting point(from 132 34℃ to 70 97 ℃),low density(from 0 9467?g/cm\+3 to 0\^9283?g/cm\+3) and narrow molecular weight distribution(from 2\^29 to 1\^86).However,it’s no obvious influence of th e comonomer effect on the physical properties of the copolymers.